If I was going to invest in a blockchain game then it would be Steemmonsters.com. They run daily tournaments where you can win your investment back + you could always sell your cards if you get sick of the game.
My second choice would be to use the funds to advertise your content. This would mean you are powering up via using advertising bots and promoting your content which in turn may get you a few more followers / upvotes on your content.
Below is my affiliate link if you intend on signing up.
https://steemmonsters.com?ref=rentmoney